Two parallel-plate capacitors X and Y have the same area of plates and same separation between them. X has air between the plates, while Y contains a dielectric medium of εr = 4.
(i) Calculate capacitance of each capacitor if the equivalent capacitance of the combination is 4 μF.
(ii) Calculate the potential difference between the plates X and Y.
(iii) Estimate the ratio of electrostatic energies stored in X and Y.
(i) We know that the capacitance of a parallel-plate capacitor is given by
`=>C_(eq)=(C_xC_Y)/(C_x+C_Y) = 4muF`
(ii) The potential difference between plates X and Y can be calculated as follows:
(iii) The ratio of electrostatic energies can be calculated as follows:
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- Capacitance of a Parallel Plate Capacitor with and Without Dielectric Medium Between the Plates